from: http://www.thefreedictionary.com/Chockablockchock-a-block or chock·a·block (chk-blk)adj.
1. Squeezed together; jammed: The cheering fans were chock-a-block in the stands.
2. Completely filled; stuffed: “I recommend the north shore chowder, chockablock with pieces of seasonal fish” (Charles Monaghan).
3. Nautical Drawn so close as to have the blocks touching. Used of a ship’s hoisting tackle.
adv.
Chock: a hall that was chock-a-block full.